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AIQuiet 6d · day 7

Stepfun's Step 5 Preview lands on Artificial Analysis' Pareto frontier

Benchmarking firm Artificial Analysis rates Stepfun's new Step 5 Preview LLM as a top performer for its price, ahead of Stepfun's own launch post.

newest coverage 6d agosummary written 6d ago8 pieces1.5k likes & upvotes151 comments Hacker NewsMastodonNewswiresX

What to know

  • Step 5 Preview scores 44 on the Artificial Analysis Intelligence Index, well above the median of 24 for comparable models.
  • Pricing is competitive at $1.00 per 1M input tokens and $2.70 per 1M output tokens versus medians of $1.88 and $10.00.
  • The model supports text and image input with a 1M-token context window but is notably verbose, using 160M tokens on the benchmark versus a 92M median.
  • Coverage so far is limited to the benchmark report and Stepfun's own launch page, with minimal independent discussion.

Stepfun AI company, developer of Step 5 PreviewArtificial Analysis Independent AI model benchmarking firm

How it unfolded 2 developments, newest first · click a bar or a number to jump articlesposts

Peak 3 pieces in two hours at Sep 19, 10 PM; 8 pieces over 7 days (2 articles · 6 posts) Sep 19, 12 AM — 2 pieces · 1 article · 1 post — Hacker News 1, Newswires 1Sep 19, 2 AM — 1 piece · 1 post — Mastodon 1Sep 19, 4 AM — quietSep 19, 6 AM — quietSep 19, 8 AM — quietSep 19, 10 AM — quietSep 19, 12 PM — quietSep 19, 2 PM — quietSep 19, 4 PM — quietSep 19, 6 PM — quietSep 19, 8 PM — quietSep 19, 10 PM — 3 pieces · 1 article · 2 posts — X 1, Hacker News 1, Newswires 1Sep 20, 12 AM — 2 pieces · 2 posts — Mastodon 2Sep 20, 2 AM — quietSep 20, 4 AM — quietSep 20, 6 AM — quietSep 20, 8 AM — quietSep 20, 10 AM — quietSep 20, 12 PM — quietSep 20, 2 PM — quietSep 20, 4 PM — quietSep 20, 6 PM — quietSep 20, 8 PM — quietSep 20, 10 PM — quietSep 21, 12 AM — quietSep 21, 2 AM — quietSep 21, 4 AM — quietSep 21, 6 AM — quietSep 21, 8 AM — quietSep 21, 10 AM — quietSep 21, 12 PM — quietSep 21, 2 PM — quietSep 21, 4 PM — quietSep 21, 6 PM — quietSep 21, 8 PM — quietSep 21, 10 PM — quietSep 22, 12 AM — quietSep 22, 2 AM — quietSep 22, 4 AM — quietSep 22, 6 AM — quietSep 22, 8 AM — quietSep 22, 10 AM — quietSep 22, 12 PM — quietSep 22, 2 PM — quietSep 22, 4 PM — quietSep 22, 6 PM — quietSep 22, 8 PM — quietSep 22, 10 PM — quietSep 23, 12 AM — quietSep 23, 2 AM — quietSep 23, 4 AM — quietSep 23, 6 AM — quietSep 23, 8 AM — quietSep 23, 10 AM — quietSep 23, 12 PM — quietSep 23, 2 PM — quietSep 23, 4 PM — quietSep 23, 6 PM — quietSep 23, 8 PM — quietSep 23, 10 PM — quietSep 24, 12 AM — quietSep 24, 2 AM — quietSep 24, 4 AM — quietSep 24, 6 AM — quietSep 24, 8 AM — quietSep 24, 10 AM — quietSep 24, 12 PM — quietSep 24, 2 PM — quietSep 24, 4 PM — quietSep 24, 6 PM — quietSep 24, 8 PM — quietSep 24, 10 PM — quietYesterday, 12 AM — quietYesterday, 2 AM — quietYesterday, 4 AM — quietYesterday, 6 AM — quietYesterday, 8 AM — quietYesterday, 10 AM — quietYesterday, 12 PM — quietYesterday, 2 PM — quietYesterday, 4 PM — quietYesterday, 6 PM — quietYesterday, 8 PM — quietYesterday, 10 PM — quietToday, 12 AM — quietToday, 2 AM — quietToday, 4 AM — quietToday, 6 AM — quietToday, 8 AM — quietToday, 10 AM — quiet 12
Sep 20Sep 21Sep 22Sep 23Sep 24yesterdaynow · 11:46 AM ET
  1. 2

    Stepfun publishes its own Step 5 Preview launch page

    Stepfun posted its official announcement, titled "Step 5 Preview: Advancing the Pareto Frontier," on stepfun.com, echoing the Pareto-frontier framing used in the independent benchmark.

    • Introducing Step 5 Preview: Advancing the Pareto Frontier. Step 5 Preview is our new flagship model for agentic work, delivering frontier-level performance across software engineering and professional knowledge work, with particular strength in finance. - 600B total / 27B

      @StepFun_aiX6d ago1.4k▲view on X ↗
  2. 1

    Artificial Analysis benchmarks Stepfun's Step 5 Preview

    Artificial Analysis' model page reports Step 5 Preview scores 44 on its Intelligence Index (median 24), calling it well above average among comparable models, faster than average, competitively priced ($1.00/1M input, $2.70/1M output tokens), but very verbose, generating 160M tokens during evaluation versus a 92M median.

    “Step 5 Preview is amongst the leading models in intelligence and well priced when comparing to other models of similar price.”
    — Artificial Analysis
    1. 1 outlet Step 5 Preview: Advancing the Pareto Frontier

      first by HN Frontpage, 6d ago

    2. 1 outlet Stepfun Step 5 Preview (LLM): On AA Pareto frontier

      first by HN Frontpage, 7d ago